Update src/ast/mod.rs

Co-authored-by: Ifeanyi Ubah <[email protected]>

Author: git-hulk

src/ast/mod.rs

@@ -428,8 +428,8 @@ impl fmt::Display for Interval {
 pub struct StructField {
     pub field_name: Option<Ident>,
     pub field_type: DataType,
-    // BigQuery supports options for struct fields.
-    // see [BigQuery]: https://cloud.google.com/bigquery/docs/reference/standard-sql/data-definition-language#column_name_and_column_schema
+    /// Struct field options.
+    /// see [BigQuery]: https://cloud.google.com/bigquery/docs/reference/standard-sql/data-definition-language#column_name_and_column_schema
     pub options: Option<Vec<SqlOption>>,
 }